题目内容：

People __1._（live） in different countries made different kinds of words. Today there are about fifteen hundred __2._ in the world. Each contains many thousands of words. A very large dictionary, for example, contains four ___3._five hundred thousand words. But we do not need___4.___ these. To read short stories you need to know only about two thousand words. __5.__you leave school, you will learn only one thousand or more.

The words you know are called your vocabulary. You should try to make your vocabulary __6.__（big）. Read as many books as we can. There are a lot of books ___7.___（write） in easy English. You will enjoy them. When you meet __8._ new word, look it __9.___ in your dictionary. Your dictionary is your __10._（much） useful book.